Beth,
My search for dealing with shadows for "Samantha" made me look in my bookshelf. Guess what I found! A wonderful book entitled
Painting Children's Portraits in Pastel by Wende Caporale. I had to share this with you. Her work in pastels is beautiful. She not only leads you through several demos but even gives several examples on different lighting situations during photo shoots, to show how the light changes the outcome on the same pose/model.
I tell you I am getting old and definitely very forgetful. According to the invoice, I've had this book since December last year and somehow totally forgot about it.